Like the recycling! 👍You reminded me that I have small H2O engine kit from the BMW Centre shop here in Munich. Uses Solar power for the electrolysis and it all fits in a model car with IR control. Must try it out sometime 😎

I am left on awe of your work. However your water engine does have exhaust its water! that's why it fills up. Every time you draw in the oxygen hydrogen mix then result of the explosion is water and if you do not figure out how to get rid of it ( feeding back to the reservoir?) your cylinder will eventually fill and you will shudder to a halt.

Praise indeed sir, and I thank you.Yes the design certainly has its problems,long before the cylinder is flooded it shorts out the HT spark plug,I have made a new deflector piston which cants to a small aperture in the cylinder wall which syphons to an expansion tank.Building prototypes is great because you can make most of your mistakes in the MK1 version. Im already tinkering the MK2 into existence with the required modifications.